Mercurial > dropbear
view libtomcrypt/tests/modes_test.c @ 1715:3974f087d9c0
Disallow leading lines before the ident for server (#102)
Per RFC4253 4.2 clients must be able to process other lines of data
before the version string, server behavior is not defined neither
with MUST/SHOULD nor with MAY.
If server process up to 50 lines too - it may cause too long hanging
session with invalid/evil client that consume host resources and
potentially may lead to DDoS on poor embedded boxes.
Let's require first line from client to be version string and fail
early if it's not - matches both RFC and real OpenSSH behavior.
author | Vladislav Grishenko <themiron@users.noreply.github.com> |
---|---|
date | Mon, 15 Jun 2020 18:22:18 +0500 |
parents | 6dba84798cd5 |
children |
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis * * LibTomCrypt is a library that provides various cryptographic * algorithms in a highly modular and flexible manner. * * The library is free for all purposes without any express * guarantee it works. */ /* test CFB/OFB/CBC modes */ #include <tomcrypt_test.h> int modes_test(void) { int ret = CRYPT_NOP; #ifdef LTC_CBC_MODE symmetric_CBC cbc; #endif #ifdef LTC_CFB_MODE symmetric_CFB cfb; #endif #ifdef LTC_OFB_MODE symmetric_OFB ofb; #endif #if defined(LTC_CBC_MODE) || defined(LTC_CFB_MODE) || defined(LTC_OFB_MODE) unsigned char pt[64], ct[64], tmp[64], key[16], iv[16], iv2[16]; int cipher_idx; unsigned long l; /* make a random pt, key and iv */ yarrow_read(pt, 64, &yarrow_prng); yarrow_read(key, 16, &yarrow_prng); yarrow_read(iv, 16, &yarrow_prng); /* get idx of AES handy */ cipher_idx = find_cipher("aes"); if (cipher_idx == -1) { fprintf(stderr, "test requires AES"); return 1; } #endif #ifdef LTC_F8_MODE DO(ret = f8_test_mode()); #endif #ifdef LTC_LRW_MODE DO(ret = lrw_test()); #endif #ifdef LTC_CBC_MODE /* test CBC mode */ /* encode the block */ DO(ret = cbc_start(cipher_idx, iv, key, 16, 0, &cbc)); l = sizeof(iv2); DO(ret = cbc_getiv(iv2, &l, &cbc)); if (l != 16 || memcmp(iv2, iv, 16)) { fprintf(stderr, "cbc_getiv failed"); return 1; } DO(ret = cbc_encrypt(pt, ct, 64, &cbc)); /* decode the block */ DO(ret = cbc_setiv(iv2, l, &cbc)); zeromem(tmp, sizeof(tmp)); DO(ret = cbc_decrypt(ct, tmp, 64, &cbc)); if (memcmp(tmp, pt, 64) != 0) { fprintf(stderr, "CBC failed"); return 1; } #endif #ifdef LTC_CFB_MODE /* test CFB mode */ /* encode the block */ DO(ret = cfb_start(cipher_idx, iv, key, 16, 0, &cfb)); l = sizeof(iv2); DO(ret = cfb_getiv(iv2, &l, &cfb)); /* note we don't memcmp iv2/iv since cfb_start processes the IV for the first block */ if (l != 16) { fprintf(stderr, "cfb_getiv failed"); return 1; } DO(ret = cfb_encrypt(pt, ct, 64, &cfb)); /* decode the block */ DO(ret = cfb_setiv(iv, l, &cfb)); zeromem(tmp, sizeof(tmp)); DO(ret = cfb_decrypt(ct, tmp, 64, &cfb)); if (memcmp(tmp, pt, 64) != 0) { fprintf(stderr, "CFB failed"); return 1; } #endif #ifdef LTC_OFB_MODE /* test OFB mode */ /* encode the block */ DO(ret = ofb_start(cipher_idx, iv, key, 16, 0, &ofb)); l = sizeof(iv2); DO(ret = ofb_getiv(iv2, &l, &ofb)); if (l != 16 || memcmp(iv2, iv, 16)) { fprintf(stderr, "ofb_getiv failed"); return 1; } DO(ret = ofb_encrypt(pt, ct, 64, &ofb)); /* decode the block */ DO(ret = ofb_setiv(iv2, l, &ofb)); zeromem(tmp, sizeof(tmp)); DO(ret = ofb_decrypt(ct, tmp, 64, &ofb)); if (memcmp(tmp, pt, 64) != 0) { fprintf(stderr, "OFB failed"); return 1; } #endif #if defined(LTC_CTR_MODE) && defined(LTC_RIJNDAEL) DO(ret = ctr_test()); #endif #ifdef LTC_XTS_MODE DO(ret = xts_test()); #endif return 0; } /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */